[nas] Re: help with using sox with nas-piping sound

[Dave Richards]

Okay all, I have to jump in here. ;)

   I have always thought that it would be way cool to run Xawtv over to
a remote display, but just assumed (maybe incorrectly) that it was doing
a low level open of the local video card on the console and would not
work on a remote display.   Are you saying that you are getting the
video to go over there??   What does it look like if it works.  We have
400 NCD thin clients here with NAS, and have always thought it would be
cool to build a tv server host, build a Linux system, with 4 PCI/WinTV
cards and then be able to distribute them out to any of the 400
terminals.

Thanks for any info!
Dave


On Fri, 2002-10-04 at 17:24, sibusiso xolo wrote:
> On Wednesday 02 October 2002 13:58, Tobias Diedrich wrote:
> > sibusiso xolo wrote:
> > > I am trying to route sound from a bt848 tv/radio card  (using v4l) to a
> > > remote nas server:
> >
> > In this case it is not good to globally export the LD_PRELOAD line
> > because this means libaudiooss is linked agains every app you start
> > after that and it always tries to redirect accesses to /dev/dsp to the
> > server.
> > auplay does seem to have some problems with playing from stdin, but this
> > should work:
> >
> > LD_PRELOAD= sox -w -s -c 2 -r 44100 -t ossdsp /dev/dsp -t raw - |
> > LD_PRELOAD=libaudiooss.so sox -t raw -w -s -c 2 -r 44100 - -t ossdsp
> > /dev/dsp
> >
> > Here the first sox command is used without libaudiooss preloaded so that
> > it will access your real soundcard and the second is used with
> > libaudiooss preloaded so that the output will get redirected to the
> > server.
> 
> I  expected the above command when executed to  hang and allow the start of 
> xawtv in another terminal and the piping of sound.  There seems to be  a 
> delay needed in  the above command to allow resampling of the sound.  I read 
> the man page of sox  but the use of resample  is not straightforward.  I 
> would be grateful for  you suggestions .
> 
> regards
> sibu
-- 
Dave Richards <drichard at largo.com>